Zhang Qian-y
2014
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Journal
Chinese Journal of Power Sources
Abstract
4-bromo-2-fluoromethoxybenzene (BFMB) was used as a novel bi-functional electrolyte additive for lithium-ion batteries and studied by cyclic voltammetry, charge-discharge measurements, overcharge and flammability tests, differential scanning calorimetry (DSC) analysis. The results show that the additive can electrochemically polymerize at 4.6 V (vs. Li/Li+) to form a polymer film, preventing the voltage rise when overcharging. The additive can lower the flammability of the electrolyte and enhance the thermal stability of the lithium-ion batteries. The additive does not influence the normal cycle performance of lithium-ion batteries. Thus, it is possible to be used as bi-functional electrolyte additive to provide overcharge protection and fire retardancy for lithium-ion batteries.